Date: Sat, 21 Jan 2012 15:38:59 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: Gleb Smirnoff <glebius@FreeBSD.org> Cc: current@FreeBSD.org Subject: Re: new panic in cpu_reset() with WITNESS Message-ID: <4F1ABFF3.9090305@FreeBSD.org> In-Reply-To: <20120120154158.GD16676@FreeBSD.org> References: <20120117110242.GD12760@glebius.int.ru> <20120120154158.GD16676@FreeBSD.org>
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on 20/01/2012 17:41 Gleb Smirnoff said the following: > > On Tue, Jan 17, 2012 at 03:02:42PM +0400, Gleb Smirnoff wrote: > T> New panic has been introduced somewhere between > T> r229851 and r229932, that happens on shutdown if > T> kernel has WITNESS and doesn't have WITNESS_SKIPSPIN. > > I've run through binary search and panic was introduced > by r229854. > Which means that it was introduced by one of the earlier commits (probably mine). Thank you for this investigative work! Although, to be frank and honest, I still don't see how the problem could be a non-issue before. So any help/ideas/guesses are appreciated. P.S. I also have a big suspicion that we have more problems that can be triggered by WITNESS && !WITNESS_SKIPSPIN, but which are harmless in practice. -- Andriy Gapon
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